SDR ASAA2019030928546

Service difficulty report · Warning System · Boeing 737890

Difficulty date: March 9, 2019
Submitted: March 11, 2019
Operation: Air carrier
Aircraft: N597AS
Make and model: Boeing 737890
Aircraft serial: 35689
Aircraft time: 41,518 hours, 12,629 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: NR
How discovered: O
Nature of condition: N
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT PACK CAUTION LIGHT ILLUMINATES ON MASTER CAUTION RECALL. UPON PRESSING MASTER CAUTION PRESS TO RESET LIGHT DOES RESET/GO OUT. GROUNDED - YES. ACCOMPLISHED NR 1, NR 2 PZTC BITE TET PER AMM 21-61-00-700-806-002, NR 2 PZTC TEST PASSED, NO FAULT NOTED, NR 1 PZTC FAULTED TCV, RESET NR 1 PZTC, RECALL TEST PASSED, NO ACTIVE FAULT, NORMAL INDICATION RESTORED, CLEARS MEL 21-32B.